Top 11 Linux commands for Automation Tester/SDET interview?

• ls: used for listing of files

                ls -al; gives detailed information of the files

                ls -a:Listing Hidden Files

• cat: creating and viewing of files

                cat > filename : create new file

                cat filename: to view file

                cat fileone finetwo > filecombined : combine two files into one

• rm: to delete files

                rm filename

• mv: to move files

                mv file location   (location is the path where you want to move the file)

• chmod: To change permission

               chmod 777 filename (777 is the permission code)

               chown: change ownership of file

               chown owner:groupowner filename

• grep:To search pattern

              search test in all text files then grep command will be:

             grep test *.txt

• tail: to display last lines of files

             tail -n 5 test.txt : it will display last 5 lines of test.txt file

• ssh: to connect to remote linux machines

              ssh user@IP

             for example the command will look like; ssh sidharth@192.168.x.x

• traceroute:

               tracks the route that a particular packet of information takes to reach to the host
               traceroute www.automationreinvented.blogspot.com

• ftp and sftp:

               to connect to remote server and download files

               $ ftp IP/hostname

               ftp> mget *.txt

• ps: to check process

               ps -ef: current running process

              we can choose more or less with below
              ps -ef | less or more

•  dstat – view processes, memory, paging, I/O, CPU, etc., in real-time. All-in-one for vmstat, iostat, netstat, and ifstat.
• iotop – interactive I/O viewer. Get an overview of storage r/w activity.
• rsync – remote file transfers and syncing. 

 

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